Concentrating table



Get. 2, 1928.

E. DEISTER CONCENTRATING TABLE Fi led May 21, 1925 5 Sheets-Sheet INVENTOR. Zmiijaiafer ATTORNEY.

0&2, 1928.

11,685,386 E. DEISTER CONCENTRATING TABLE Filed May 21, 1925 5 She ets-vSheet,

I INVENTOR. #4 mi {jails Zia) BY ZUQLQ Z ATTORNEY.

Get. 2, 1928.

E. DEISTER CONCENTRATING TABLE Filed May 21, 1925 5 Sheets-Sheet 3 R m m m ATTORNEY.

mama

Oct. 2, 1928.

' E. DEISTER CONCENTRATING TABLE Filed May 21, 1925 5 Sheets-Sheet 4 A TTORNE Y.

Oct. 2, 1 928.

685,986 E. DEISTER lllll lln q IIH' 1 llll l.

.1 Illll Ill $2 I I N VEN TOR,

.Eniz zeml'er BY ldjw ATTORNEYS.

Fat-sated Oct. 2, 1.228.

UNITE fiTATES ATE EMIL DEISTER, OF FORT WAYNE, INDIANA.

CONCENTRATING TABLE.

Application filed May 21, 1925. Serial No. 31,789.

The invent-ion relates to concentrating tables of the reciprocable type and especially to such tables designed primarily for the cleaning of coal, graphite, iron and other materials. The object of the invention is to provide a table by which coal and other materials may be effectively concentrated or cleaned of refuse.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a side elevational view of a table (without a cover) embodying the invention; Fig. 2 a. plan view of the same, the water pipes being removed; Fig. 3 a cross-section of the deck on line 3 3 of Fig. 2; Fig. 4 a cross-section on line l-l of F 2; Fig. 5 a crosssection on line 55 of Fig. 2; F g. 6 a crosssection on line 6- -6 of Fig. 2; ldig. 7 a plan view of a fraction of one of the concentrating troughs or launders with the cover in position; Fig. 8 a side elevational view of the same; Fig. 9 a crosssection on line 9-9 of ig. '8; Fig. 10 an enlarged cross-sectional view on line 1010 of Fig. 7; Fig. 11 a plan view of the bottom member of one of the concentrating troughs or launders; Fig. 12 a side elevatio-nal view of the same; Fig. 13 a cross section on line 1318 of Fig. 11; Fig. let a plan view of a modified form of covering for the bottom of the concentrating decks or launderc: Fig. a cross-section on line 1515 of Fig. 14-, and Fig. 16 a plan view of the table with the water pipes rennwcd.

la the drawings, which illustrate but one enibodin'ient of theinvention, lreprescnts suitable base or support, and 2 a differential reciprocating motion mechanism which is at tached by the rod 3 to the tabl 1 at 5. The table is supported on four S1 ble slipper bearings 6, two of which. are shown in 1, the other two beingat the opposite side of the table. A compres ion coil sprin ably engaged one end to the table and at its other end it is engaged by a cap 8 attached to screw Elinou-ntcd in a frame 10. The ten .si .21 on he spring is regulated by adjusting the .:.c 9. The driving mechanism moves the table rearwardly and the spring retracts the table forwardly, theend 11 ofv the table adjacent to the mechanism 2 being considered the head or rear end of the same. As is shown in Fig. 1. the table in operating posit-ion is inclined downwardly from its h ad end 11 toward the forward end 12.

In Order that the table shall have a lar capacity, I preferably form it with two sides A and B sloping downwardly transversely in opposite directions like a roof. For this construction the main frame comprises a series of sloping rafters 13 (Fig. 4f) meeting at their upper ends and the lower ends of each pair being tied by a cross beam. 14. A board 15 is secured to all the tie-beams. A flooring 16 is secured to the outer faces of the rafters and forms the surface of the table upon which the concentratin troughs or launders are formed.

The ridge of the frame is cut off at its rear end to form a. smooth or flat space covered by aboard 17 which is substantially horizontal in the operating position of the table. This flat surface is provided so that the water box 18 may be readily and rigidly attached to the table at said surface. A suitable conduit, such as a water pipe 19, is fixed or suspended over the table and a hose or other suitable conduit is connected to the pipe for supplying water to the box 18. lipertures 20 are formed in the bottom of the box, preferably at its opposite sides, through which the water discharges onto the downwardly sloping sides: of the deck below.

The rear end 21 of the flat port-ion 17 of the deck slopes downwardly to another horizontally disposed flat section 22 which extends to the rear end 11 of the table. The section 22 is preferably widest transversely along said rear end of the table and tapers transversely toward the elevated fiat section 17. A feed box 23 is suitably mounted above this section 22 from which the materials to be treated descend upon the section. The opposite sides of the section 22 are the sloping sides of the main section or conform thereto.

A hi gh board 24: extends across the rear end of the table and the opposite side portions of the table are substantially ii-trough shaped as shown in Figs. 3, i, 5 and 6, that is: the flooring on the rafters forms one side of the trough upon each side of the table. The outer side of each trough is formed by the board 25 that is secured to the lower ends of the rafters and slopes outwardly and upwardly preferably at 90 to the same, and an upstanding board 26 is secured along the outer edge of the board 25. Each trough, as well as the entire surface of the deck, thus far described is covered with linoleum 27 or other suitable covering to protect the surfaces beneath.

An opening 28 is formed at a selected point in. the ridge of the frame in which a suitable sleeve or funnelslike casting mounted that extends through the root or top of the deck and is adapted to receive and conduct wastematerials to a trough or chute 3O disposed beneath said top as more fully described hereafter.

The constructions incorporated in each of the main V-shaped troughs A am B are d uplicates, hence but one set will be described,

A board 31 is suitably secured on the 1nner side of the troughthat is formed by the sloping side A of the table top. This board extends "from the forward or discharge end of the side A (F i gs. 1, 2, 4) down the slope of said side, at a selected angle, to the side board 25, and upon the upper edge of the board 31 is secured a cap member 32 that forms a guard, the rearward end of which is reduced shown at 32 in Figs. 2, 7 and 8, for releasing the coal. or other materials, as de scribed hereinafter. A V-shaped strip 33 may be inse ted in the bottom of the trough and the linoleum placed over it. A screen 34 is secured to the side board 26 and to the guard 32 adjacent to the reduced portion 32 thereof, and also to a board 35 that is secured to the side and to the side 31. A bafile 36 is secured to the side 25 forwardly of the forward edge of the screen to divert inwardly the materials that descend from screen into the portion of: the trough A below and fen wardly of the screen.

At a suitable point above the junction between the sidewall 31 and the wall A a board 37 2, 4, 7, 8) is secured to the said walls, the rear end of the board being reduced in width to closely engage the sloping wall 25. This board 37 is substantially level transversely at any point, but slopes downwardly from its forward end at the forward end 01 the table toward the side 25, and forms the bottom of a concentrating trough or launder C that slopes upwardly along the side A of the deck, and diagonally to the line of reciprocation of the deck. The forward upper end of this 'launder C is adjacent a sleeve or funnel-like casting 38, similar to member 29, and adapted to conduct into the trough or chute all materials that travel up the launder and discharge from the iomvard end thereof.

The space beneath the bottom 37 forms a water channel. or conduit. D to which a water conduit or hose 39 is connected. The opposite ends of this channel are closed and apertures 40 are formed at suitable intervals in the bottom 37 overeach group of which a screen 41 is secured. A suitable covering is also applied on the bottom 37. In Figs. 7 and 10 the cover comprises a plurality of strips of material 42, preferably formed of rubber, which are laid across the bottom and overlapped, the exposed edge of each strip facing the discharge or forward end of the 60130011 trating launder. Or, as shown in Fig. 15,

the cover 43 may be molded with a saw-tooth effect and laid on the bottom in sections, with a screen between each two sections, the screens being disposed over the apertures 40, and the ribs extending across the bottom as before.

A rii'lie 44 of suitable height is secured on the bottom 37, and it extends from the rear end oi the same forwardly a selected distance, as to the forward end of the discharge edge 32, so as to prevent the materials from crowding over the said edge too rapidly and to facilitate the stratification of the same in the concentrating launder.

Ata suitable distance above the bottom '37 a ljioard 46 is secured to the wall A and projects therefrom to form a water launder E upon said wall, the said board being aperturod at 47. This launder is substantially level in the operating position of the table. The rear end of this water launder E is open and communicates with a space beneath the screen 48, which screen is similar to the screen 34 and is connected to the outer side member of the main trough A, to the transverse board 49 and to-the reduced portion 50 of a cap or guard 50 that is secured to the upper edge of a board 51, (Figs. 1, 2 and 4). The board 51 is a duplicate ofthe board 31 and is mounted on the side wall A of the trough A in the same manner as the board 31. he upper end of this board abuts the casting 29 and its lower end approaches the board 25. A board 52 similar to the board 37 is similarly secured to the board 51 and to the side A and forms the bottom of an upwardly sloping concentrating launder F that is similar to the launder C, the rear or lower end of the board 52 being engaged to the side relatively near to the rear end of the table and to the feed receiving surface 22. The space below the board 52 forms a water channel G to which water may be supplied by a connection similar to the connection 39. The board 52 may also have apertures in it similar to the apertures 40 in the bottom 37 to admit water from the channel G into the concentrating launder F. A screen covers each aperture as in the concentrating launder F and a. transversely ribbed covering similar to that in launder F is placed onthe bottoniboard No waterlaimder similar to the launder E is required for the concentrating launder F since water from the water box 18 descends into this launder. A riflie 53 is secured to the bottom 52 at its rear end and it similar to the rilfle 44, and a baffle 36* similar to the baflie 36 is similarly mounted. forwardly of the board 49.

A perforated pipe 54 is mounted on the guard 50 and communicates with the water supply pipe 1.9 under the control of a valve 55 and a similar perforated pipe 56 is mounted on the guard 32 and communicates rith the water pipe 19 under the control of a valve 57. Each of. these perfor-ated'pipes ill) is adapted to discharge water into the concentrating launder to. which it is attached, either pipe or both pipes being operated when desired.

In the illustrative adaptation of the invention only two concentrating launders in each main trough are shown, but it is to be understood that the table may be formed in any length and with as many concentrating launders thereon as'are practicable for the work intended to be done by the table.

In order that the water may be separated from the materials that pass over the edge 52 of the 'l'orwardmost concentrating launder, I provide a discharge pipe 58 for the space or compartment beneath the screen 34 through which the water may escape or be conducted to a selected point. I may close cit the discharge 58 and cover the screen with a suitable covering to prevent the water passing down through the screen, whereupon the water and the materials will descend from the cover into the valley A below the screen and leave the table at the discharge end 59 of said trough.

When the table is in operation the materials to be treated are fed with water onto the surface 22 from which the same descends into the rear or upper ends of the valleys A and B down which they travel toward and into the first concentrating launders F, F. Since these launders are inclined upwardly and diagonal to the line of reciprocation of the table the materials are met by the dressing water descending in each said launder which cooperates with the ritlle there on and the reciprocating movement of the table to eiiect a Stratification of the material. The lighter particles of the material rise to the upper strata and as soon as the bed of materials in the launder is deep enough they pass over the edge 5O onto the screen -18. The heavier materials, under the influence of the movement of the deck travel up the launders and discharge through the cast ing 29 into the trough or chute 30. The lighter material and such heavier material as may have passed over with it, drops off the screens 48 into the valley A below and passes into the next concentrating launder where they again stratify, the lighter material being held back by the dressing water which flows along this launder and finally dischargesover the edge 32 onto the screen. adjacent thereto. The water from the previous concentrating launder largely descends through the screen 48 into the compartment below and flows into the water launder E from which it discharges into the concentrating launder C below. particles travelup the slope of the launder C and discharge through the spout casting at the discharge end of the table into the trough 30. The lighter particles drop into the valley A and pass off the table at the The heavier discharge end 59 of the valley. The water either descends through the screen 3st and discharges through the conduit 58 or, if this screen has been covered, it discharges into the valley A along with the li The same operations take place on the other side lot the table. In each concentrating launder the transverse ribs tend to hold the lower strata of the material against rearward movement and to assist in advancing them toward the discharge opening or spout casting. lVhere additional concentrating launders are desirable the same procedure is followed as above described to the final launder and final discharge of the heavier particles and the lighter particles.

In the treatment of coal the water discharging from the first concentrating launders is generally suitable for subsequent use in the concentrating launders, and it is generally desirable to use the water channels below these launders. lVhen water is turned into these channels it passes upwardly through the apertures and screens into the concentrating launders and keeps the mass of material in the launders in motion so that the lighter materials or coal work up into the upper strata.

In treating iron ores the dressing water usually becomes very dirty and it is not desirable to reuse it on each subsequent concentrating launder. In such cases I cover up the screens as, 34 by placing on them any suitable material, such as rubber or sheet iron which will prevent the water from flowing into the dressing water launders and cause it to pass down the main valleys or troughs A and B.

In treating iron oes the iron particles travel up the concentrating launders and discharge into the trough 30 and the clay or mud escapes over the sides of the launders.

In treating graphite, the refuse travels up the launders and the values pass over the sides of the launders as in the case of coal, and in treating all other materials the heavier particles travel up the concentrating launders and the lighter particles are pushed over the discharge side of .each launder.

When it is desirable, the water pipes 54 and 56 may be turned on and the water chan nels beneath the concentrating launders may be cut out. In such cases it will be desirable to cover up the screens in the bottom of the concentrating launders so that water or the materials will not pass through the apertures into the water channels beneath those launders. If the intended use of the table does not make the screened apertures desirable they may be omitted, or at least the screens may be removed and the covering on the bottom of the launder continued over the apertures.

The quantity of dressing water fed to the table depends upon the class of material bc ghter m aterialf l Hr I St) tin ing'treated, it being apparent that the water should never be vfed in such quantity as to wash the materials down the slope of the con centrating launders which it is intended shall be caused to travel up those slopes.

It will be noted that the bottom of each concentrating launder slopes upwardly and its sides slope upwardly and outwardly; that the bottom is approximately flat transversely; that the launder is disposed diagonally to the direction of reciprocation of the table and that the discharge for the heavier materials at the upper end is higher than the discharge at the side for the lighter materials. lVhen the table is in operation the materials mixed with water pass into the launder at the lower end and the dressing water flows along the launder. Because of the sloping side walls and the angular disposition of the launder relatively to the line of motion of the table, the contents of each launder are agitated, oppositely moving waves being formed which meet in the middle portion of the launder and'lift the material and thereby assist in the rapid Stratification and washing of the material. The dressing water is preferably fed largely at the upper part of the launder and it tends to wash the lighter materials down the slope of the launder while the heavier particles climb the slope of the launder and discharge at its upper end. The sawtooth bottom, having its shoulders facing the discharge end of the launder, assists in advancing the heavier materials up the slope and tends to prevent them from slipping backwardly.

As shown in Figs. 8 and 12 the upward inclination of the bottom of each launder is greater at its forward portion (30 than rearwardly thereof. This increased inclination facilitates the final cleaning of the material and prevents the lighter particles from passing to the upper end of the launder.

A single stratifying launder is very e tective to fully concentrate certain materials, such as anthracite coal of considerable size, but one ormore additional launders are preferable for most materials since each one after the first stratifies the ighter particles laterally discharged from the launder rearwardly of it and hence more and more of the heavier particles are removed from the mass of material fed to the table.

In treating coal the heavier slate and rock are removed in the first launder, the next heavier in the next launder, etc. the coal at all times being held back in the launders and directed toward the discharge point therefor.

hat- I claim is: I

1. A concentrating table comprising a deck transversely inclined and inclined downward ly from its head end toward its foot or-dis-.

charge end, means to reciprocate the deck longitudinally, a series of upwardly inclined transversely inclined and inclined down-' wardly from its head end toward'its foot or discharge end, means to reciprocate the deck longitudinally, means to feed material to be treated to the deck adjacent the head end thereof, a series of upwardly inclined stratifying members diagonally disposed on the deck relatively to the line of reciprocation thereof, and intercepting the material as it moves down the slope of the deck under the influence of gravity and'the said movement of the deck. 7 I

3. A concentrating table comprising a transversely inclined deck inclined downwardly from its head end toward its opposite or discharge end, means at the head end toreciprocate the deck longitudinally, aseries of concentrating launders on the transversely sloping surface of the deck which slope upwardly toward the discharge end of the deck and which are diagonal to the direction of reciprocation of the deck, the bottom of each launder projecting laterally fromthe trans versely sloping surface, upwardly projecting members along the side edges of said bottoms and forming the outer side members of the laundcrs, means to feed dressing water to the launders and means to feed material to be treated to the deck adjacent the head end thereof.

l-. A concentrating table comprising a transversely inclined deck sloping down- Jug.

wardly from its head end toward its opposite or discharge end, means to reciprocate the deck longitudinally, a series of launders on the transverse slope of the deck which slope upwardly diagonally to the direction of reci i rocation of the deck and which are adapted to stratify the materials fed to the table, the surface of the bottom of each launder beir adapten to cause the lower strata of matcrial in the launder, under the influence of the movement of the deck. to advance up the -'Zlii=}fl(. of the launder and discharge at the upper end thereof, and means to feed dressing water to the launders including a water be); ad uppermo launder. and a dressing water launder-1m. each'of the concentrating launders below into which the dressing water from the concentrating launder above discharges.

A concentrating table comprising a deck apted. to feed dressing water to the clined deck at an angle thereto, means secured to the outer side edge of the bottom to form the outer wall of the launder, means to feet dressing water to the launder and means to feed materials to be concentrated to the launder at its lower end.

6. A. concentrating table comprising a deck inclined downwardly from its nead end toward its opposite or forward end and also.

transversely inclined, means to reciprocate the deck longitudin ally, a stratifying launder formed on the transverse slope of the deck and extending upwardly and for *ardly thereon diagonally to the direction of rec-procation of the deck, the bottom of the launder being secured to said transversely sloped deck and projecting laterallytherefrom and hayin a series of transverse upright shoulders on its surface that face the upper end of the launder, means to feed dressing water to the launder and means to feed materials to be concentrated to the launder at itslower end.

7. A concentrating table comprising a deck inclined downwardly from its head end toward its opposite or forward end and also transversely inclined, means to reciprocate the deck longitudinally, a stratifyinglaunder formed on the transverse slope of the deck and extending upwardly and forwardly thereon diagonally to the direction of reciprocation of the deck, the deck forming one side of the launder, a bottom forming member projecting laterally from the deck, outwardly flaring means on the bottom to form the other side of the launder, the bottom ofthe launder having a series of transverse upright shoulders on its surface that face the upper end of thelaunder, means to feed dressing water to the launder and means to feed materials to be concentrated to the launder at its lower one.

8. A concentrating table comprising an inverted V-shaped deck inclined downwardly from its head end toward its foot or discharge end, means to reciprocate the deck longitudinally, a series of upwardly inclined stratifying launders carried by each declined side of the deck and diagonally disposed thereon relatively to the direction of reciprocation of the deck, the bottom of each launder being substantially level transversely, means to feed dressing water to each stratifying launder, and means to feed materials to be treated to the deck adjacent the head end thereof, the inclination of each stratifying launder being in a direction opposed to the said inclination of the deck, and a series of transverse shoulders on the bottom of each stratifying launder facin the upper or discharge end thereof.

in witness whereof I have hereunto set my hand this 18th day of May, 1925;

EMIL DEISTER. 

